17336d0e6SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2b1e71b06SSteven Whitehouse /* 3b1e71b06SSteven Whitehouse * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4b1e71b06SSteven Whitehouse * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. 5b1e71b06SSteven Whitehouse */ 6b1e71b06SSteven Whitehouse 7b1e71b06SSteven Whitehouse #include <linux/sched.h> 8b1e71b06SSteven Whitehouse #include <linux/slab.h> 9b1e71b06SSteven Whitehouse #include <linux/spinlock.h> 10b1e71b06SSteven Whitehouse #include <linux/completion.h> 11b1e71b06SSteven Whitehouse #include <linux/buffer_head.h> 12b1e71b06SSteven Whitehouse #include <linux/pagemap.h> 13b1e71b06SSteven Whitehouse #include <linux/pagevec.h> 14b1e71b06SSteven Whitehouse #include <linux/mpage.h> 15b1e71b06SSteven Whitehouse #include <linux/fs.h> 16b1e71b06SSteven Whitehouse #include <linux/writeback.h> 17b1e71b06SSteven Whitehouse #include <linux/swap.h> 18b1e71b06SSteven Whitehouse #include <linux/gfs2_ondisk.h> 19b1e71b06SSteven Whitehouse #include <linux/backing-dev.h> 20e2e40f2cSChristoph Hellwig #include <linux/uio.h> 21774016b2SSteven Whitehouse #include <trace/events/writeback.h> 2264bc06bbSAndreas Gruenbacher #include <linux/sched/signal.h> 23b1e71b06SSteven Whitehouse 24b1e71b06SSteven Whitehouse #include "gfs2.h" 25b1e71b06SSteven Whitehouse #include "incore.h" 26b1e71b06SSteven Whitehouse #include "bmap.h" 27b1e71b06SSteven Whitehouse #include "glock.h" 28b1e71b06SSteven Whitehouse #include "inode.h" 29b1e71b06SSteven Whitehouse #include "log.h" 30b1e71b06SSteven Whitehouse #include "meta_io.h" 31b1e71b06SSteven Whitehouse #include "quota.h" 32b1e71b06SSteven Whitehouse #include "trans.h" 33b1e71b06SSteven Whitehouse #include "rgrp.h" 34b1e71b06SSteven Whitehouse #include "super.h" 35b1e71b06SSteven Whitehouse #include "util.h" 36b1e71b06SSteven Whitehouse #include "glops.h" 3764bc06bbSAndreas Gruenbacher #include "aops.h" 38b1e71b06SSteven Whitehouse 39b1e71b06SSteven Whitehouse 40c1b0c3cfSAndreas Gruenbacher void gfs2_trans_add_databufs(struct gfs2_inode *ip, struct folio *folio, 41285e0fc9SMatthew Wilcox (Oracle) size_t from, size_t len) 42b1e71b06SSteven Whitehouse { 43c1b0c3cfSAndreas Gruenbacher struct buffer_head *head = folio_buffers(folio); 44b1e71b06SSteven Whitehouse unsigned int bsize = head->b_size; 45b1e71b06SSteven Whitehouse struct buffer_head *bh; 46285e0fc9SMatthew Wilcox (Oracle) size_t to = from + len; 47285e0fc9SMatthew Wilcox (Oracle) size_t start, end; 48b1e71b06SSteven Whitehouse 49b1e71b06SSteven Whitehouse for (bh = head, start = 0; bh != head || !start; 50b1e71b06SSteven Whitehouse bh = bh->b_this_page, start = end) { 51b1e71b06SSteven Whitehouse end = start + bsize; 5288b65ce5SAndreas Gruenbacher if (end <= from) 53b1e71b06SSteven Whitehouse continue; 5488b65ce5SAndreas Gruenbacher if (start >= to) 5588b65ce5SAndreas Gruenbacher break; 56b1e71b06SSteven Whitehouse set_buffer_uptodate(bh); 57350a9b0aSSteven Whitehouse gfs2_trans_add_data(ip->i_gl, bh); 58b1e71b06SSteven Whitehouse } 59b1e71b06SSteven Whitehouse } 60b1e71b06SSteven Whitehouse 61b1e71b06SSteven Whitehouse /** 62b1e71b06SSteven Whitehouse * gfs2_get_block_noalloc - Fills in a buffer head with details about a block 63b1e71b06SSteven Whitehouse * @inode: The inode 64b1e71b06SSteven Whitehouse * @lblock: The block number to look up 65b1e71b06SSteven Whitehouse * @bh_result: The buffer head to return the result in 66b1e71b06SSteven Whitehouse * @create: Non-zero if we may add block to the file 67b1e71b06SSteven Whitehouse * 68b1e71b06SSteven Whitehouse * Returns: errno 69b1e71b06SSteven Whitehouse */ 70b1e71b06SSteven Whitehouse 71b1e71b06SSteven Whitehouse static int gfs2_get_block_noalloc(struct inode *inode, sector_t lblock, 72b1e71b06SSteven Whitehouse struct buffer_head *bh_result, int create) 73b1e71b06SSteven Whitehouse { 74b1e71b06SSteven Whitehouse int error; 75b1e71b06SSteven Whitehouse 76b1e71b06SSteven Whitehouse error = gfs2_block_map(inode, lblock, bh_result, 0); 77b1e71b06SSteven Whitehouse if (error) 78b1e71b06SSteven Whitehouse return error; 79b1e71b06SSteven Whitehouse if (!buffer_mapped(bh_result)) 804e79e3f0SBob Peterson return -ENODATA; 81b1e71b06SSteven Whitehouse return 0; 82b1e71b06SSteven Whitehouse } 83b1e71b06SSteven Whitehouse 84b1e71b06SSteven Whitehouse /** 85c1401fd1SMatthew Wilcox (Oracle) * gfs2_write_jdata_folio - gfs2 jdata-specific version of block_write_full_page 86c1401fd1SMatthew Wilcox (Oracle) * @folio: The folio to write 8721b6924bSBob Peterson * @wbc: The writeback control 8821b6924bSBob Peterson * 8921b6924bSBob Peterson * This is the same as calling block_write_full_page, but it also 90fd4c5748SBenjamin Marzinski * writes pages outside of i_size 91fd4c5748SBenjamin Marzinski */ 92c1401fd1SMatthew Wilcox (Oracle) static int gfs2_write_jdata_folio(struct folio *folio, 93fd4c5748SBenjamin Marzinski struct writeback_control *wbc) 94fd4c5748SBenjamin Marzinski { 95c1401fd1SMatthew Wilcox (Oracle) struct inode * const inode = folio->mapping->host; 96fd4c5748SBenjamin Marzinski loff_t i_size = i_size_read(inode); 97fd4c5748SBenjamin Marzinski 98fd4c5748SBenjamin Marzinski /* 99c1401fd1SMatthew Wilcox (Oracle) * The folio straddles i_size. It must be zeroed out on each and every 100fd4c5748SBenjamin Marzinski * writepage invocation because it may be mmapped. "A file is mapped 101fd4c5748SBenjamin Marzinski * in multiples of the page size. For a file that is not a multiple of 102fd4c5748SBenjamin Marzinski * the page size, the remaining memory is zeroed when mapped, and 103fd4c5748SBenjamin Marzinski * writes to that region are not written out to the file." 104fd4c5748SBenjamin Marzinski */ 105c1401fd1SMatthew Wilcox (Oracle) if (folio_pos(folio) < i_size && 106c1401fd1SMatthew Wilcox (Oracle) i_size < folio_pos(folio) + folio_size(folio)) 107c1401fd1SMatthew Wilcox (Oracle) folio_zero_segment(folio, offset_in_folio(folio, i_size), 108c1401fd1SMatthew Wilcox (Oracle) folio_size(folio)); 109fd4c5748SBenjamin Marzinski 11053418a18SMatthew Wilcox (Oracle) return __block_write_full_folio(inode, folio, gfs2_get_block_noalloc, 11153418a18SMatthew Wilcox (Oracle) wbc, end_buffer_async_write); 112fd4c5748SBenjamin Marzinski } 113fd4c5748SBenjamin Marzinski 114b1e71b06SSteven Whitehouse /** 115d0cfcaeeSMatthew Wilcox (Oracle) * __gfs2_jdata_write_folio - The core of jdata writepage 116d0cfcaeeSMatthew Wilcox (Oracle) * @folio: The folio to write 117b1e71b06SSteven Whitehouse * @wbc: The writeback control 118b1e71b06SSteven Whitehouse * 119b1e71b06SSteven Whitehouse * This is shared between writepage and writepages and implements the 120b1e71b06SSteven Whitehouse * core of the writepage operation. If a transaction is required then 121d0cfcaeeSMatthew Wilcox (Oracle) * the checked flag will have been set and the transaction will have 122b1e71b06SSteven Whitehouse * already been started before this is called. 123b1e71b06SSteven Whitehouse */ 124d0cfcaeeSMatthew Wilcox (Oracle) static int __gfs2_jdata_write_folio(struct folio *folio, 125d0cfcaeeSMatthew Wilcox (Oracle) struct writeback_control *wbc) 126b1e71b06SSteven Whitehouse { 127d0cfcaeeSMatthew Wilcox (Oracle) struct inode *inode = folio->mapping->host; 128b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 129b1e71b06SSteven Whitehouse 130d0cfcaeeSMatthew Wilcox (Oracle) if (folio_test_checked(folio)) { 131d0cfcaeeSMatthew Wilcox (Oracle) folio_clear_checked(folio); 132d0cfcaeeSMatthew Wilcox (Oracle) if (!folio_buffers(folio)) { 133d0cfcaeeSMatthew Wilcox (Oracle) folio_create_empty_buffers(folio, 134d0cfcaeeSMatthew Wilcox (Oracle) inode->i_sb->s_blocksize, 13547a9a527SFabian Frederick BIT(BH_Dirty)|BIT(BH_Uptodate)); 136b1e71b06SSteven Whitehouse } 137d0cfcaeeSMatthew Wilcox (Oracle) gfs2_trans_add_databufs(ip, folio, 0, folio_size(folio)); 138b1e71b06SSteven Whitehouse } 139c1401fd1SMatthew Wilcox (Oracle) return gfs2_write_jdata_folio(folio, wbc); 140b1e71b06SSteven Whitehouse } 141b1e71b06SSteven Whitehouse 142b1e71b06SSteven Whitehouse /** 143b1e71b06SSteven Whitehouse * gfs2_jdata_writepage - Write complete page 144b1e71b06SSteven Whitehouse * @page: Page to write 1451272574bSFabian Frederick * @wbc: The writeback control 146b1e71b06SSteven Whitehouse * 147b1e71b06SSteven Whitehouse * Returns: errno 148b1e71b06SSteven Whitehouse * 149b1e71b06SSteven Whitehouse */ 150b1e71b06SSteven Whitehouse 151b1e71b06SSteven Whitehouse static int gfs2_jdata_writepage(struct page *page, struct writeback_control *wbc) 152b1e71b06SSteven Whitehouse { 153c0ba597dSMatthew Wilcox (Oracle) struct folio *folio = page_folio(page); 154b1e71b06SSteven Whitehouse struct inode *inode = page->mapping->host; 155fd4c5748SBenjamin Marzinski struct gfs2_inode *ip = GFS2_I(inode); 156b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 157b1e71b06SSteven Whitehouse 158fd4c5748SBenjamin Marzinski if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(ip->i_gl))) 159fd4c5748SBenjamin Marzinski goto out; 160c0ba597dSMatthew Wilcox (Oracle) if (folio_test_checked(folio) || current->journal_info) 161b1e71b06SSteven Whitehouse goto out_ignore; 162d0cfcaeeSMatthew Wilcox (Oracle) return __gfs2_jdata_write_folio(folio, wbc); 163b1e71b06SSteven Whitehouse 164b1e71b06SSteven Whitehouse out_ignore: 165c0ba597dSMatthew Wilcox (Oracle) folio_redirty_for_writepage(wbc, folio); 166fd4c5748SBenjamin Marzinski out: 167c0ba597dSMatthew Wilcox (Oracle) folio_unlock(folio); 168b1e71b06SSteven Whitehouse return 0; 169b1e71b06SSteven Whitehouse } 170b1e71b06SSteven Whitehouse 171b1e71b06SSteven Whitehouse /** 17245138990SSteven Whitehouse * gfs2_writepages - Write a bunch of dirty pages back to disk 173b1e71b06SSteven Whitehouse * @mapping: The mapping to write 174b1e71b06SSteven Whitehouse * @wbc: Write-back control 175b1e71b06SSteven Whitehouse * 17645138990SSteven Whitehouse * Used for both ordered and writeback modes. 177b1e71b06SSteven Whitehouse */ 17845138990SSteven Whitehouse static int gfs2_writepages(struct address_space *mapping, 179b1e71b06SSteven Whitehouse struct writeback_control *wbc) 180b1e71b06SSteven Whitehouse { 181b066a4eeSAbhi Das struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping); 1822164f9b9SChristoph Hellwig struct iomap_writepage_ctx wpc = { }; 1832164f9b9SChristoph Hellwig int ret; 184b066a4eeSAbhi Das 185b066a4eeSAbhi Das /* 186b066a4eeSAbhi Das * Even if we didn't write any pages here, we might still be holding 187b066a4eeSAbhi Das * dirty pages in the ail. We forcibly flush the ail because we don't 188b066a4eeSAbhi Das * want balance_dirty_pages() to loop indefinitely trying to write out 189b066a4eeSAbhi Das * pages held in the ail that it can't find. 190b066a4eeSAbhi Das */ 1912164f9b9SChristoph Hellwig ret = iomap_writepages(mapping, wbc, &wpc, &gfs2_writeback_ops); 192b066a4eeSAbhi Das if (ret == 0) 193b066a4eeSAbhi Das set_bit(SDF_FORCE_AIL_FLUSH, &sdp->sd_flags); 194b066a4eeSAbhi Das return ret; 195b1e71b06SSteven Whitehouse } 196b1e71b06SSteven Whitehouse 197b1e71b06SSteven Whitehouse /** 19887ed37e6SVishal Moola (Oracle) * gfs2_write_jdata_batch - Write back a folio batch's worth of folios 199b1e71b06SSteven Whitehouse * @mapping: The mapping 200b1e71b06SSteven Whitehouse * @wbc: The writeback control 20187ed37e6SVishal Moola (Oracle) * @fbatch: The batch of folios 2021272574bSFabian Frederick * @done_index: Page index 203b1e71b06SSteven Whitehouse * 204b1e71b06SSteven Whitehouse * Returns: non-zero if loop should terminate, zero otherwise 205b1e71b06SSteven Whitehouse */ 206b1e71b06SSteven Whitehouse 20787ed37e6SVishal Moola (Oracle) static int gfs2_write_jdata_batch(struct address_space *mapping, 208b1e71b06SSteven Whitehouse struct writeback_control *wbc, 20987ed37e6SVishal Moola (Oracle) struct folio_batch *fbatch, 210774016b2SSteven Whitehouse pgoff_t *done_index) 211b1e71b06SSteven Whitehouse { 212b1e71b06SSteven Whitehouse struct inode *inode = mapping->host; 213b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode); 21487ed37e6SVishal Moola (Oracle) unsigned nrblocks; 215b1e71b06SSteven Whitehouse int i; 216b1e71b06SSteven Whitehouse int ret; 21787ed37e6SVishal Moola (Oracle) int nr_pages = 0; 21887ed37e6SVishal Moola (Oracle) int nr_folios = folio_batch_count(fbatch); 21987ed37e6SVishal Moola (Oracle) 22087ed37e6SVishal Moola (Oracle) for (i = 0; i < nr_folios; i++) 22187ed37e6SVishal Moola (Oracle) nr_pages += folio_nr_pages(fbatch->folios[i]); 22287ed37e6SVishal Moola (Oracle) nrblocks = nr_pages * (PAGE_SIZE >> inode->i_blkbits); 223b1e71b06SSteven Whitehouse 224b1e71b06SSteven Whitehouse ret = gfs2_trans_begin(sdp, nrblocks, nrblocks); 225b1e71b06SSteven Whitehouse if (ret < 0) 226b1e71b06SSteven Whitehouse return ret; 227b1e71b06SSteven Whitehouse 22887ed37e6SVishal Moola (Oracle) for (i = 0; i < nr_folios; i++) { 22987ed37e6SVishal Moola (Oracle) struct folio *folio = fbatch->folios[i]; 230b1e71b06SSteven Whitehouse 23187ed37e6SVishal Moola (Oracle) *done_index = folio->index; 232774016b2SSteven Whitehouse 23387ed37e6SVishal Moola (Oracle) folio_lock(folio); 234b1e71b06SSteven Whitehouse 23587ed37e6SVishal Moola (Oracle) if (unlikely(folio->mapping != mapping)) { 236774016b2SSteven Whitehouse continue_unlock: 23787ed37e6SVishal Moola (Oracle) folio_unlock(folio); 238b1e71b06SSteven Whitehouse continue; 239b1e71b06SSteven Whitehouse } 240b1e71b06SSteven Whitehouse 24187ed37e6SVishal Moola (Oracle) if (!folio_test_dirty(folio)) { 242774016b2SSteven Whitehouse /* someone wrote it for us */ 243774016b2SSteven Whitehouse goto continue_unlock; 244b1e71b06SSteven Whitehouse } 245b1e71b06SSteven Whitehouse 24687ed37e6SVishal Moola (Oracle) if (folio_test_writeback(folio)) { 247b1e71b06SSteven Whitehouse if (wbc->sync_mode != WB_SYNC_NONE) 24887ed37e6SVishal Moola (Oracle) folio_wait_writeback(folio); 249774016b2SSteven Whitehouse else 250774016b2SSteven Whitehouse goto continue_unlock; 251b1e71b06SSteven Whitehouse } 252b1e71b06SSteven Whitehouse 25387ed37e6SVishal Moola (Oracle) BUG_ON(folio_test_writeback(folio)); 25487ed37e6SVishal Moola (Oracle) if (!folio_clear_dirty_for_io(folio)) 255774016b2SSteven Whitehouse goto continue_unlock; 256774016b2SSteven Whitehouse 257de1414a6SChristoph Hellwig trace_wbc_writepage(wbc, inode_to_bdi(inode)); 258b1e71b06SSteven Whitehouse 259d0cfcaeeSMatthew Wilcox (Oracle) ret = __gfs2_jdata_write_folio(folio, wbc); 260774016b2SSteven Whitehouse if (unlikely(ret)) { 261774016b2SSteven Whitehouse if (ret == AOP_WRITEPAGE_ACTIVATE) { 26287ed37e6SVishal Moola (Oracle) folio_unlock(folio); 263774016b2SSteven Whitehouse ret = 0; 264774016b2SSteven Whitehouse } else { 265b1e71b06SSteven Whitehouse 266774016b2SSteven Whitehouse /* 267774016b2SSteven Whitehouse * done_index is set past this page, 268774016b2SSteven Whitehouse * so media errors will not choke 269774016b2SSteven Whitehouse * background writeout for the entire 270774016b2SSteven Whitehouse * file. This has consequences for 271774016b2SSteven Whitehouse * range_cyclic semantics (ie. it may 272774016b2SSteven Whitehouse * not be suitable for data integrity 273774016b2SSteven Whitehouse * writeout). 274774016b2SSteven Whitehouse */ 275*5f02d168SMinjie Du *done_index = folio_next_index(folio); 276b1e71b06SSteven Whitehouse ret = 1; 277774016b2SSteven Whitehouse break; 278774016b2SSteven Whitehouse } 279774016b2SSteven Whitehouse } 280774016b2SSteven Whitehouse 281774016b2SSteven Whitehouse /* 282774016b2SSteven Whitehouse * We stop writing back only if we are not doing 283774016b2SSteven Whitehouse * integrity sync. In case of integrity sync we have to 284774016b2SSteven Whitehouse * keep going until we have written all the pages 285774016b2SSteven Whitehouse * we tagged for writeback prior to entering this loop. 286774016b2SSteven Whitehouse */ 287774016b2SSteven Whitehouse if (--wbc->nr_to_write <= 0 && wbc->sync_mode == WB_SYNC_NONE) { 288774016b2SSteven Whitehouse ret = 1; 289774016b2SSteven Whitehouse break; 290774016b2SSteven Whitehouse } 291774016b2SSteven Whitehouse 292b1e71b06SSteven Whitehouse } 293b1e71b06SSteven Whitehouse gfs2_trans_end(sdp); 294b1e71b06SSteven Whitehouse return ret; 295b1e71b06SSteven Whitehouse } 296b1e71b06SSteven Whitehouse 297b1e71b06SSteven Whitehouse /** 298b1e71b06SSteven Whitehouse * gfs2_write_cache_jdata - Like write_cache_pages but different 299b1e71b06SSteven Whitehouse * @mapping: The mapping to write 300b1e71b06SSteven Whitehouse * @wbc: The writeback control 301b1e71b06SSteven Whitehouse * 302b1e71b06SSteven Whitehouse * The reason that we use our own function here is that we need to 303b1e71b06SSteven Whitehouse * start transactions before we grab page locks. This allows us 304b1e71b06SSteven Whitehouse * to get the ordering right. 305b1e71b06SSteven Whitehouse */ 306b1e71b06SSteven Whitehouse 307b1e71b06SSteven Whitehouse static int gfs2_write_cache_jdata(struct address_space *mapping, 308b1e71b06SSteven Whitehouse struct writeback_control *wbc) 309b1e71b06SSteven Whitehouse { 310b1e71b06SSteven Whitehouse int ret = 0; 311b1e71b06SSteven Whitehouse int done = 0; 31287ed37e6SVishal Moola (Oracle) struct folio_batch fbatch; 31387ed37e6SVishal Moola (Oracle) int nr_folios; 3143f649ab7SKees Cook pgoff_t writeback_index; 315b1e71b06SSteven Whitehouse pgoff_t index; 316b1e71b06SSteven Whitehouse pgoff_t end; 317774016b2SSteven Whitehouse pgoff_t done_index; 318774016b2SSteven Whitehouse int cycled; 319b1e71b06SSteven Whitehouse int range_whole = 0; 32010bbd235SMatthew Wilcox xa_mark_t tag; 321b1e71b06SSteven Whitehouse 32287ed37e6SVishal Moola (Oracle) folio_batch_init(&fbatch); 323b1e71b06SSteven Whitehouse if (wbc->range_cyclic) { 324774016b2SSteven Whitehouse writeback_index = mapping->writeback_index; /* prev offset */ 325774016b2SSteven Whitehouse index = writeback_index; 326774016b2SSteven Whitehouse if (index == 0) 327774016b2SSteven Whitehouse cycled = 1; 328774016b2SSteven Whitehouse else 329774016b2SSteven Whitehouse cycled = 0; 330b1e71b06SSteven Whitehouse end = -1; 331b1e71b06SSteven Whitehouse } else { 33209cbfeafSKirill A. Shutemov index = wbc->range_start >> PAGE_SHIFT; 33309cbfeafSKirill A. Shutemov end = wbc->range_end >> PAGE_SHIFT; 334b1e71b06SSteven Whitehouse if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) 335b1e71b06SSteven Whitehouse range_whole = 1; 336774016b2SSteven Whitehouse cycled = 1; /* ignore range_cyclic tests */ 337b1e71b06SSteven Whitehouse } 338774016b2SSteven Whitehouse if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) 339774016b2SSteven Whitehouse tag = PAGECACHE_TAG_TOWRITE; 340774016b2SSteven Whitehouse else 341774016b2SSteven Whitehouse tag = PAGECACHE_TAG_DIRTY; 342b1e71b06SSteven Whitehouse 343b1e71b06SSteven Whitehouse retry: 344774016b2SSteven Whitehouse if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) 345774016b2SSteven Whitehouse tag_pages_for_writeback(mapping, index, end); 346774016b2SSteven Whitehouse done_index = index; 347774016b2SSteven Whitehouse while (!done && (index <= end)) { 34887ed37e6SVishal Moola (Oracle) nr_folios = filemap_get_folios_tag(mapping, &index, end, 34987ed37e6SVishal Moola (Oracle) tag, &fbatch); 35087ed37e6SVishal Moola (Oracle) if (nr_folios == 0) 351774016b2SSteven Whitehouse break; 352774016b2SSteven Whitehouse 35387ed37e6SVishal Moola (Oracle) ret = gfs2_write_jdata_batch(mapping, wbc, &fbatch, 35487ed37e6SVishal Moola (Oracle) &done_index); 355b1e71b06SSteven Whitehouse if (ret) 356b1e71b06SSteven Whitehouse done = 1; 357b1e71b06SSteven Whitehouse if (ret > 0) 358b1e71b06SSteven Whitehouse ret = 0; 35987ed37e6SVishal Moola (Oracle) folio_batch_release(&fbatch); 360b1e71b06SSteven Whitehouse cond_resched(); 361b1e71b06SSteven Whitehouse } 362b1e71b06SSteven Whitehouse 363774016b2SSteven Whitehouse if (!cycled && !done) { 364b1e71b06SSteven Whitehouse /* 365774016b2SSteven Whitehouse * range_cyclic: 366b1e71b06SSteven Whitehouse * We hit the last page and there is more work to be done: wrap 367b1e71b06SSteven Whitehouse * back to the start of the file 368b1e71b06SSteven Whitehouse */ 369774016b2SSteven Whitehouse cycled = 1; 370b1e71b06SSteven Whitehouse index = 0; 371774016b2SSteven Whitehouse end = writeback_index - 1; 372b1e71b06SSteven Whitehouse goto retry; 373b1e71b06SSteven Whitehouse } 374b1e71b06SSteven Whitehouse 375b1e71b06SSteven Whitehouse if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) 376774016b2SSteven Whitehouse mapping->writeback_index = done_index; 377774016b2SSteven Whitehouse 378b1e71b06SSteven Whitehouse return ret; 379b1e71b06SSteven Whitehouse } 380b1e71b06SSteven Whitehouse 381b1e71b06SSteven Whitehouse 382b1e71b06SSteven Whitehouse /** 383b1e71b06SSteven Whitehouse * gfs2_jdata_writepages - Write a bunch of dirty pages back to disk 384b1e71b06SSteven Whitehouse * @mapping: The mapping to write 385b1e71b06SSteven Whitehouse * @wbc: The writeback control 386b1e71b06SSteven Whitehouse * 387b1e71b06SSteven Whitehouse */ 388b1e71b06SSteven Whitehouse 389b1e71b06SSteven Whitehouse static int gfs2_jdata_writepages(struct address_space *mapping, 390b1e71b06SSteven Whitehouse struct writeback_control *wbc) 391b1e71b06SSteven Whitehouse { 392b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 393b1e71b06SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(mapping->host); 394b1e71b06SSteven Whitehouse int ret; 395b1e71b06SSteven Whitehouse 396b1e71b06SSteven Whitehouse ret = gfs2_write_cache_jdata(mapping, wbc); 397b1e71b06SSteven Whitehouse if (ret == 0 && wbc->sync_mode == WB_SYNC_ALL) { 398805c0907SBob Peterson gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL | 399805c0907SBob Peterson GFS2_LFC_JDATA_WPAGES); 400b1e71b06SSteven Whitehouse ret = gfs2_write_cache_jdata(mapping, wbc); 401b1e71b06SSteven Whitehouse } 402b1e71b06SSteven Whitehouse return ret; 403b1e71b06SSteven Whitehouse } 404b1e71b06SSteven Whitehouse 405b1e71b06SSteven Whitehouse /** 406b1e71b06SSteven Whitehouse * stuffed_readpage - Fill in a Linux page with stuffed file data 407b1e71b06SSteven Whitehouse * @ip: the inode 408b1e71b06SSteven Whitehouse * @page: the page 409b1e71b06SSteven Whitehouse * 410b1e71b06SSteven Whitehouse * Returns: errno 411b1e71b06SSteven Whitehouse */ 412378b6cbfSChristoph Hellwig static int stuffed_readpage(struct gfs2_inode *ip, struct page *page) 413b1e71b06SSteven Whitehouse { 414b1e71b06SSteven Whitehouse struct buffer_head *dibh; 415602c89d2SSteven Whitehouse u64 dsize = i_size_read(&ip->i_inode); 416b1e71b06SSteven Whitehouse void *kaddr; 417b1e71b06SSteven Whitehouse int error; 418b1e71b06SSteven Whitehouse 419b1e71b06SSteven Whitehouse /* 420b1e71b06SSteven Whitehouse * Due to the order of unstuffing files and ->fault(), we can be 421b1e71b06SSteven Whitehouse * asked for a zero page in the case of a stuffed file being extended, 422b1e71b06SSteven Whitehouse * so we need to supply one here. It doesn't happen often. 423b1e71b06SSteven Whitehouse */ 424b1e71b06SSteven Whitehouse if (unlikely(page->index)) { 42509cbfeafSKirill A. Shutemov zero_user(page, 0, PAGE_SIZE); 426b1e71b06SSteven Whitehouse SetPageUptodate(page); 427b1e71b06SSteven Whitehouse return 0; 428b1e71b06SSteven Whitehouse } 429b1e71b06SSteven Whitehouse 430b1e71b06SSteven Whitehouse error = gfs2_meta_inode_buffer(ip, &dibh); 431b1e71b06SSteven Whitehouse if (error) 432b1e71b06SSteven Whitehouse return error; 433b1e71b06SSteven Whitehouse 43458721bd4SDeepak R Varma kaddr = kmap_local_page(page); 435602c89d2SSteven Whitehouse memcpy(kaddr, dibh->b_data + sizeof(struct gfs2_dinode), dsize); 43609cbfeafSKirill A. Shutemov memset(kaddr + dsize, 0, PAGE_SIZE - dsize); 43758721bd4SDeepak R Varma kunmap_local(kaddr); 438b1e71b06SSteven Whitehouse flush_dcache_page(page); 439b1e71b06SSteven Whitehouse brelse(dibh); 440b1e71b06SSteven Whitehouse SetPageUptodate(page); 441b1e71b06SSteven Whitehouse 442b1e71b06SSteven Whitehouse return 0; 443b1e71b06SSteven Whitehouse } 444b1e71b06SSteven Whitehouse 445e9b5b23eSMatthew Wilcox (Oracle) /** 446e9b5b23eSMatthew Wilcox (Oracle) * gfs2_read_folio - read a folio from a file 447e9b5b23eSMatthew Wilcox (Oracle) * @file: The file to read 448e9b5b23eSMatthew Wilcox (Oracle) * @folio: The folio in the file 449e9b5b23eSMatthew Wilcox (Oracle) */ 450e9b5b23eSMatthew Wilcox (Oracle) static int gfs2_read_folio(struct file *file, struct folio *folio) 451b1e71b06SSteven Whitehouse { 452e9b5b23eSMatthew Wilcox (Oracle) struct inode *inode = folio->mapping->host; 4532164f9b9SChristoph Hellwig struct gfs2_inode *ip = GFS2_I(inode); 4542164f9b9SChristoph Hellwig struct gfs2_sbd *sdp = GFS2_SB(inode); 455b1e71b06SSteven Whitehouse int error; 456b1e71b06SSteven Whitehouse 4572164f9b9SChristoph Hellwig if (!gfs2_is_jdata(ip) || 458e9b5b23eSMatthew Wilcox (Oracle) (i_blocksize(inode) == PAGE_SIZE && !folio_buffers(folio))) { 4597479c505SMatthew Wilcox (Oracle) error = iomap_read_folio(folio, &gfs2_iomap_ops); 460f95cbb44SAndreas Gruenbacher } else if (gfs2_is_stuffed(ip)) { 461e9b5b23eSMatthew Wilcox (Oracle) error = stuffed_readpage(ip, &folio->page); 462e9b5b23eSMatthew Wilcox (Oracle) folio_unlock(folio); 463b1e71b06SSteven Whitehouse } else { 464f132ab7dSMatthew Wilcox (Oracle) error = mpage_read_folio(folio, gfs2_block_map); 465b1e71b06SSteven Whitehouse } 466b1e71b06SSteven Whitehouse 467eb43e660SBob Peterson if (unlikely(gfs2_withdrawn(sdp))) 468b1e71b06SSteven Whitehouse return -EIO; 469b1e71b06SSteven Whitehouse 470b1e71b06SSteven Whitehouse return error; 471b1e71b06SSteven Whitehouse } 472b1e71b06SSteven Whitehouse 473b1e71b06SSteven Whitehouse /** 474b1e71b06SSteven Whitehouse * gfs2_internal_read - read an internal file 475b1e71b06SSteven Whitehouse * @ip: The gfs2 inode 476b1e71b06SSteven Whitehouse * @buf: The buffer to fill 477b1e71b06SSteven Whitehouse * @pos: The file position 478b1e71b06SSteven Whitehouse * @size: The amount to read 479b1e71b06SSteven Whitehouse * 480b1e71b06SSteven Whitehouse */ 481b1e71b06SSteven Whitehouse 4824306629eSAndrew Price int gfs2_internal_read(struct gfs2_inode *ip, char *buf, loff_t *pos, 4834306629eSAndrew Price unsigned size) 484b1e71b06SSteven Whitehouse { 485b1e71b06SSteven Whitehouse struct address_space *mapping = ip->i_inode.i_mapping; 48645eb0504SAndreas Gruenbacher unsigned long index = *pos >> PAGE_SHIFT; 48709cbfeafSKirill A. Shutemov unsigned offset = *pos & (PAGE_SIZE - 1); 488b1e71b06SSteven Whitehouse unsigned copied = 0; 489b1e71b06SSteven Whitehouse unsigned amt; 490b1e71b06SSteven Whitehouse struct page *page; 491b1e71b06SSteven Whitehouse 492b1e71b06SSteven Whitehouse do { 493cea44032SAndreas Gruenbacher page = read_cache_page(mapping, index, gfs2_read_folio, NULL); 494cea44032SAndreas Gruenbacher if (IS_ERR(page)) { 495cea44032SAndreas Gruenbacher if (PTR_ERR(page) == -EINTR) 496cea44032SAndreas Gruenbacher continue; 497cea44032SAndreas Gruenbacher return PTR_ERR(page); 498cea44032SAndreas Gruenbacher } 499b1e71b06SSteven Whitehouse amt = size - copied; 50009cbfeafSKirill A. Shutemov if (offset + size > PAGE_SIZE) 50109cbfeafSKirill A. Shutemov amt = PAGE_SIZE - offset; 502d68d0c6cSAndreas Gruenbacher memcpy_from_page(buf + copied, page, offset, amt); 50309cbfeafSKirill A. Shutemov put_page(page); 504b1e71b06SSteven Whitehouse copied += amt; 505b1e71b06SSteven Whitehouse index++; 506b1e71b06SSteven Whitehouse offset = 0; 507b1e71b06SSteven Whitehouse } while(copied < size); 508b1e71b06SSteven Whitehouse (*pos) += size; 509b1e71b06SSteven Whitehouse return size; 510b1e71b06SSteven Whitehouse } 511b1e71b06SSteven Whitehouse 512b1e71b06SSteven Whitehouse /** 513d4388340SMatthew Wilcox (Oracle) * gfs2_readahead - Read a bunch of pages at once 514c551f66cSLee Jones * @rac: Read-ahead control structure 515b1e71b06SSteven Whitehouse * 516b1e71b06SSteven Whitehouse * Some notes: 517b1e71b06SSteven Whitehouse * 1. This is only for readahead, so we can simply ignore any things 518b1e71b06SSteven Whitehouse * which are slightly inconvenient (such as locking conflicts between 519b1e71b06SSteven Whitehouse * the page lock and the glock) and return having done no I/O. Its 520b1e71b06SSteven Whitehouse * obviously not something we'd want to do on too regular a basis. 521b1e71b06SSteven Whitehouse * Any I/O we ignore at this time will be done via readpage later. 522b1e71b06SSteven Whitehouse * 2. We don't handle stuffed files here we let readpage do the honours. 523d4388340SMatthew Wilcox (Oracle) * 3. mpage_readahead() does most of the heavy lifting in the common case. 524b1e71b06SSteven Whitehouse * 4. gfs2_block_map() is relied upon to set BH_Boundary in the right places. 525b1e71b06SSteven Whitehouse */ 526b1e71b06SSteven Whitehouse 527d4388340SMatthew Wilcox (Oracle) static void gfs2_readahead(struct readahead_control *rac) 528b1e71b06SSteven Whitehouse { 529d4388340SMatthew Wilcox (Oracle) struct inode *inode = rac->mapping->host; 530b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode); 531b1e71b06SSteven Whitehouse 5322164f9b9SChristoph Hellwig if (gfs2_is_stuffed(ip)) 5332164f9b9SChristoph Hellwig ; 5342164f9b9SChristoph Hellwig else if (gfs2_is_jdata(ip)) 535d4388340SMatthew Wilcox (Oracle) mpage_readahead(rac, gfs2_block_map); 5362164f9b9SChristoph Hellwig else 5372164f9b9SChristoph Hellwig iomap_readahead(rac, &gfs2_iomap_ops); 538b1e71b06SSteven Whitehouse } 539b1e71b06SSteven Whitehouse 540b1e71b06SSteven Whitehouse /** 541b1e71b06SSteven Whitehouse * adjust_fs_space - Adjusts the free space available due to gfs2_grow 542b1e71b06SSteven Whitehouse * @inode: the rindex inode 543b1e71b06SSteven Whitehouse */ 54464bc06bbSAndreas Gruenbacher void adjust_fs_space(struct inode *inode) 545b1e71b06SSteven Whitehouse { 546d0a22a4bSAndreas Gruenbacher struct gfs2_sbd *sdp = GFS2_SB(inode); 5471946f70aSBenjamin Marzinski struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); 548b1e71b06SSteven Whitehouse struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; 549b1e71b06SSteven Whitehouse struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; 55070c11ba8SBob Peterson struct buffer_head *m_bh; 551b1e71b06SSteven Whitehouse u64 fs_total, new_free; 552b1e71b06SSteven Whitehouse 553d0a22a4bSAndreas Gruenbacher if (gfs2_trans_begin(sdp, 2 * RES_STATFS, 0) != 0) 554d0a22a4bSAndreas Gruenbacher return; 555d0a22a4bSAndreas Gruenbacher 556b1e71b06SSteven Whitehouse /* Total up the file system space, according to the latest rindex. */ 557b1e71b06SSteven Whitehouse fs_total = gfs2_ri_total(sdp); 5581946f70aSBenjamin Marzinski if (gfs2_meta_inode_buffer(m_ip, &m_bh) != 0) 559d0a22a4bSAndreas Gruenbacher goto out; 560b1e71b06SSteven Whitehouse 561b1e71b06SSteven Whitehouse spin_lock(&sdp->sd_statfs_spin); 5621946f70aSBenjamin Marzinski gfs2_statfs_change_in(m_sc, m_bh->b_data + 5631946f70aSBenjamin Marzinski sizeof(struct gfs2_dinode)); 564b1e71b06SSteven Whitehouse if (fs_total > (m_sc->sc_total + l_sc->sc_total)) 565b1e71b06SSteven Whitehouse new_free = fs_total - (m_sc->sc_total + l_sc->sc_total); 566b1e71b06SSteven Whitehouse else 567b1e71b06SSteven Whitehouse new_free = 0; 568b1e71b06SSteven Whitehouse spin_unlock(&sdp->sd_statfs_spin); 569b1e71b06SSteven Whitehouse fs_warn(sdp, "File system extended by %llu blocks.\n", 570b1e71b06SSteven Whitehouse (unsigned long long)new_free); 571b1e71b06SSteven Whitehouse gfs2_statfs_change(sdp, new_free, new_free, 0); 5721946f70aSBenjamin Marzinski 57370c11ba8SBob Peterson update_statfs(sdp, m_bh); 5741946f70aSBenjamin Marzinski brelse(m_bh); 575d0a22a4bSAndreas Gruenbacher out: 576d0a22a4bSAndreas Gruenbacher sdp->sd_rindex_uptodate = 0; 577d0a22a4bSAndreas Gruenbacher gfs2_trans_end(sdp); 578b1e71b06SSteven Whitehouse } 579b1e71b06SSteven Whitehouse 580e621900aSMatthew Wilcox (Oracle) static bool jdata_dirty_folio(struct address_space *mapping, 581e621900aSMatthew Wilcox (Oracle) struct folio *folio) 582b1e71b06SSteven Whitehouse { 5836302d6f4SBob Peterson if (current->journal_info) 584e621900aSMatthew Wilcox (Oracle) folio_set_checked(folio); 585e621900aSMatthew Wilcox (Oracle) return block_dirty_folio(mapping, folio); 586b1e71b06SSteven Whitehouse } 587b1e71b06SSteven Whitehouse 588b1e71b06SSteven Whitehouse /** 589b1e71b06SSteven Whitehouse * gfs2_bmap - Block map function 590b1e71b06SSteven Whitehouse * @mapping: Address space info 591b1e71b06SSteven Whitehouse * @lblock: The block to map 592b1e71b06SSteven Whitehouse * 593b1e71b06SSteven Whitehouse * Returns: The disk address for the block or 0 on hole or error 594b1e71b06SSteven Whitehouse */ 595b1e71b06SSteven Whitehouse 596b1e71b06SSteven Whitehouse static sector_t gfs2_bmap(struct address_space *mapping, sector_t lblock) 597b1e71b06SSteven Whitehouse { 598b1e71b06SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(mapping->host); 599b1e71b06SSteven Whitehouse struct gfs2_holder i_gh; 600b1e71b06SSteven Whitehouse sector_t dblock = 0; 601b1e71b06SSteven Whitehouse int error; 602b1e71b06SSteven Whitehouse 603b1e71b06SSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); 604b1e71b06SSteven Whitehouse if (error) 605b1e71b06SSteven Whitehouse return 0; 606b1e71b06SSteven Whitehouse 607b1e71b06SSteven Whitehouse if (!gfs2_is_stuffed(ip)) 6087770c93aSChristoph Hellwig dblock = iomap_bmap(mapping, lblock, &gfs2_iomap_ops); 609b1e71b06SSteven Whitehouse 610b1e71b06SSteven Whitehouse gfs2_glock_dq_uninit(&i_gh); 611b1e71b06SSteven Whitehouse 612b1e71b06SSteven Whitehouse return dblock; 613b1e71b06SSteven Whitehouse } 614b1e71b06SSteven Whitehouse 615b1e71b06SSteven Whitehouse static void gfs2_discard(struct gfs2_sbd *sdp, struct buffer_head *bh) 616b1e71b06SSteven Whitehouse { 617b1e71b06SSteven Whitehouse struct gfs2_bufdata *bd; 618b1e71b06SSteven Whitehouse 619b1e71b06SSteven Whitehouse lock_buffer(bh); 620b1e71b06SSteven Whitehouse gfs2_log_lock(sdp); 621b1e71b06SSteven Whitehouse clear_buffer_dirty(bh); 622b1e71b06SSteven Whitehouse bd = bh->b_private; 623b1e71b06SSteven Whitehouse if (bd) { 624c0752aa7SBob Peterson if (!list_empty(&bd->bd_list) && !buffer_pinned(bh)) 625c0752aa7SBob Peterson list_del_init(&bd->bd_list); 62668942870SBob Peterson else { 62768942870SBob Peterson spin_lock(&sdp->sd_ail_lock); 62868cd4ce2SBob Peterson gfs2_remove_from_journal(bh, REMOVE_JDATA); 62968942870SBob Peterson spin_unlock(&sdp->sd_ail_lock); 63068942870SBob Peterson } 631b1e71b06SSteven Whitehouse } 632b1e71b06SSteven Whitehouse bh->b_bdev = NULL; 633b1e71b06SSteven Whitehouse clear_buffer_mapped(bh); 634b1e71b06SSteven Whitehouse clear_buffer_req(bh); 635b1e71b06SSteven Whitehouse clear_buffer_new(bh); 636b1e71b06SSteven Whitehouse gfs2_log_unlock(sdp); 637b1e71b06SSteven Whitehouse unlock_buffer(bh); 638b1e71b06SSteven Whitehouse } 639b1e71b06SSteven Whitehouse 6405f4b2976SMatthew Wilcox (Oracle) static void gfs2_invalidate_folio(struct folio *folio, size_t offset, 6415f4b2976SMatthew Wilcox (Oracle) size_t length) 642b1e71b06SSteven Whitehouse { 6435f4b2976SMatthew Wilcox (Oracle) struct gfs2_sbd *sdp = GFS2_SB(folio->mapping->host); 6445f4b2976SMatthew Wilcox (Oracle) size_t stop = offset + length; 6455f4b2976SMatthew Wilcox (Oracle) int partial_page = (offset || length < folio_size(folio)); 646b1e71b06SSteven Whitehouse struct buffer_head *bh, *head; 647b1e71b06SSteven Whitehouse unsigned long pos = 0; 648b1e71b06SSteven Whitehouse 6495f4b2976SMatthew Wilcox (Oracle) BUG_ON(!folio_test_locked(folio)); 6505c0bb97cSLukas Czerner if (!partial_page) 6515f4b2976SMatthew Wilcox (Oracle) folio_clear_checked(folio); 6525f4b2976SMatthew Wilcox (Oracle) head = folio_buffers(folio); 6535f4b2976SMatthew Wilcox (Oracle) if (!head) 654b1e71b06SSteven Whitehouse goto out; 655b1e71b06SSteven Whitehouse 6565f4b2976SMatthew Wilcox (Oracle) bh = head; 657b1e71b06SSteven Whitehouse do { 6585c0bb97cSLukas Czerner if (pos + bh->b_size > stop) 6595c0bb97cSLukas Czerner return; 6605c0bb97cSLukas Czerner 661b1e71b06SSteven Whitehouse if (offset <= pos) 662b1e71b06SSteven Whitehouse gfs2_discard(sdp, bh); 663b1e71b06SSteven Whitehouse pos += bh->b_size; 664b1e71b06SSteven Whitehouse bh = bh->b_this_page; 665b1e71b06SSteven Whitehouse } while (bh != head); 666b1e71b06SSteven Whitehouse out: 6675c0bb97cSLukas Czerner if (!partial_page) 6685f4b2976SMatthew Wilcox (Oracle) filemap_release_folio(folio, 0); 669b1e71b06SSteven Whitehouse } 670b1e71b06SSteven Whitehouse 671b1e71b06SSteven Whitehouse /** 672e45c20d1SMatthew Wilcox (Oracle) * gfs2_release_folio - free the metadata associated with a folio 673e45c20d1SMatthew Wilcox (Oracle) * @folio: the folio that's being released 674b1e71b06SSteven Whitehouse * @gfp_mask: passed from Linux VFS, ignored by us 675b1e71b06SSteven Whitehouse * 676e45c20d1SMatthew Wilcox (Oracle) * Calls try_to_free_buffers() to free the buffers and put the folio if the 6770ebbe4f9SAndreas Gruenbacher * buffers can be released. 678b1e71b06SSteven Whitehouse * 679e45c20d1SMatthew Wilcox (Oracle) * Returns: true if the folio was put or else false 680b1e71b06SSteven Whitehouse */ 681b1e71b06SSteven Whitehouse 682e45c20d1SMatthew Wilcox (Oracle) bool gfs2_release_folio(struct folio *folio, gfp_t gfp_mask) 683b1e71b06SSteven Whitehouse { 684e45c20d1SMatthew Wilcox (Oracle) struct address_space *mapping = folio->mapping; 685009d8518SSteven Whitehouse struct gfs2_sbd *sdp = gfs2_mapping2sbd(mapping); 686b1e71b06SSteven Whitehouse struct buffer_head *bh, *head; 687b1e71b06SSteven Whitehouse struct gfs2_bufdata *bd; 688b1e71b06SSteven Whitehouse 689e45c20d1SMatthew Wilcox (Oracle) head = folio_buffers(folio); 690e45c20d1SMatthew Wilcox (Oracle) if (!head) 691e45c20d1SMatthew Wilcox (Oracle) return false; 692b1e71b06SSteven Whitehouse 6931c185c02SAndreas Gruenbacher /* 694e45c20d1SMatthew Wilcox (Oracle) * mm accommodates an old ext3 case where clean folios might 695e45c20d1SMatthew Wilcox (Oracle) * not have had the dirty bit cleared. Thus, it can send actual 696e45c20d1SMatthew Wilcox (Oracle) * dirty folios to ->release_folio() via shrink_active_list(). 6971c185c02SAndreas Gruenbacher * 698e45c20d1SMatthew Wilcox (Oracle) * As a workaround, we skip folios that contain dirty buffers 699e45c20d1SMatthew Wilcox (Oracle) * below. Once ->release_folio isn't called on dirty folios 700e45c20d1SMatthew Wilcox (Oracle) * anymore, we can warn on dirty buffers like we used to here 701e45c20d1SMatthew Wilcox (Oracle) * again. 7021c185c02SAndreas Gruenbacher */ 7031c185c02SAndreas Gruenbacher 704b1e71b06SSteven Whitehouse gfs2_log_lock(sdp); 705e45c20d1SMatthew Wilcox (Oracle) bh = head; 706b1e71b06SSteven Whitehouse do { 707b1e71b06SSteven Whitehouse if (atomic_read(&bh->b_count)) 708b1e71b06SSteven Whitehouse goto cannot_release; 709b1e71b06SSteven Whitehouse bd = bh->b_private; 71016ca9412SBenjamin Marzinski if (bd && bd->bd_tr) 711b1e71b06SSteven Whitehouse goto cannot_release; 7121c185c02SAndreas Gruenbacher if (buffer_dirty(bh) || WARN_ON(buffer_pinned(bh))) 7131c185c02SAndreas Gruenbacher goto cannot_release; 714b1e71b06SSteven Whitehouse bh = bh->b_this_page; 715b1e71b06SSteven Whitehouse } while (bh != head); 716b1e71b06SSteven Whitehouse 717e45c20d1SMatthew Wilcox (Oracle) bh = head; 718b1e71b06SSteven Whitehouse do { 719b1e71b06SSteven Whitehouse bd = bh->b_private; 720b1e71b06SSteven Whitehouse if (bd) { 721b1e71b06SSteven Whitehouse gfs2_assert_warn(sdp, bd->bd_bh == bh); 722b1e71b06SSteven Whitehouse bd->bd_bh = NULL; 723b1e71b06SSteven Whitehouse bh->b_private = NULL; 724019dd669SBob Peterson /* 725019dd669SBob Peterson * The bd may still be queued as a revoke, in which 726019dd669SBob Peterson * case we must not dequeue nor free it. 727019dd669SBob Peterson */ 728019dd669SBob Peterson if (!bd->bd_blkno && !list_empty(&bd->bd_list)) 729019dd669SBob Peterson list_del_init(&bd->bd_list); 730019dd669SBob Peterson if (list_empty(&bd->bd_list)) 731b1e71b06SSteven Whitehouse kmem_cache_free(gfs2_bufdata_cachep, bd); 732e4f29206SSteven Whitehouse } 733b1e71b06SSteven Whitehouse 734b1e71b06SSteven Whitehouse bh = bh->b_this_page; 735b1e71b06SSteven Whitehouse } while (bh != head); 736e4f29206SSteven Whitehouse gfs2_log_unlock(sdp); 737b1e71b06SSteven Whitehouse 73868189fefSMatthew Wilcox (Oracle) return try_to_free_buffers(folio); 7398f065d36SSteven Whitehouse 740b1e71b06SSteven Whitehouse cannot_release: 741b1e71b06SSteven Whitehouse gfs2_log_unlock(sdp); 742e45c20d1SMatthew Wilcox (Oracle) return false; 743b1e71b06SSteven Whitehouse } 744b1e71b06SSteven Whitehouse 745eadd7535SChristoph Hellwig static const struct address_space_operations gfs2_aops = { 74645138990SSteven Whitehouse .writepages = gfs2_writepages, 747f132ab7dSMatthew Wilcox (Oracle) .read_folio = gfs2_read_folio, 748d4388340SMatthew Wilcox (Oracle) .readahead = gfs2_readahead, 749187c82cbSMatthew Wilcox (Oracle) .dirty_folio = filemap_dirty_folio, 7508597447dSMatthew Wilcox (Oracle) .release_folio = iomap_release_folio, 751d82354f6SMatthew Wilcox (Oracle) .invalidate_folio = iomap_invalidate_folio, 752b1e71b06SSteven Whitehouse .bmap = gfs2_bmap, 7532ec810d5SMatthew Wilcox (Oracle) .migrate_folio = filemap_migrate_folio, 7542164f9b9SChristoph Hellwig .is_partially_uptodate = iomap_is_partially_uptodate, 755aa261f54SAndi Kleen .error_remove_page = generic_error_remove_page, 756b1e71b06SSteven Whitehouse }; 757b1e71b06SSteven Whitehouse 758b1e71b06SSteven Whitehouse static const struct address_space_operations gfs2_jdata_aops = { 759b1e71b06SSteven Whitehouse .writepage = gfs2_jdata_writepage, 760b1e71b06SSteven Whitehouse .writepages = gfs2_jdata_writepages, 761f132ab7dSMatthew Wilcox (Oracle) .read_folio = gfs2_read_folio, 762d4388340SMatthew Wilcox (Oracle) .readahead = gfs2_readahead, 763e621900aSMatthew Wilcox (Oracle) .dirty_folio = jdata_dirty_folio, 764b1e71b06SSteven Whitehouse .bmap = gfs2_bmap, 7655f4b2976SMatthew Wilcox (Oracle) .invalidate_folio = gfs2_invalidate_folio, 766e45c20d1SMatthew Wilcox (Oracle) .release_folio = gfs2_release_folio, 767b1e71b06SSteven Whitehouse .is_partially_uptodate = block_is_partially_uptodate, 768aa261f54SAndi Kleen .error_remove_page = generic_error_remove_page, 769b1e71b06SSteven Whitehouse }; 770b1e71b06SSteven Whitehouse 771b1e71b06SSteven Whitehouse void gfs2_set_aops(struct inode *inode) 772b1e71b06SSteven Whitehouse { 773eadd7535SChristoph Hellwig if (gfs2_is_jdata(GFS2_I(inode))) 774b1e71b06SSteven Whitehouse inode->i_mapping->a_ops = &gfs2_jdata_aops; 775b1e71b06SSteven Whitehouse else 776eadd7535SChristoph Hellwig inode->i_mapping->a_ops = &gfs2_aops; 777b1e71b06SSteven Whitehouse } 778